I do not have the specific information about the exact specifications and characteristics of the Gri Olive Limestone from Romania. However, most limestone types are generally suitable for exterior applications due to their durability and ability to withstand varying weather conditions. However, the suitability of the limestone for use in very windy climates may depend on factors such as the density, porosity, and strength of the stone. It is recommended to consult with a professional in the field of construction or a supplier of the Gri Olive Limestone to determine its suitability for your specific project needs.